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Kazimierz Plater vs Bogdan Sliwa
POL-ch 20th (1963), Glucholazy POL, rd 3, Feb-??
Dutch Defense: Classical. Ilyin-Zhenevsky Variation General (A97)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Nov-04-13
Premium Chessgames Member
  perfidious: <Once>'s very first sentence says it all.

An example is yesterday's gem from Karpov-not the slightest chance I would have solved that puzzle, had I not known the motif from seeing the game, long ago.

Nov-04-13  TheTamale: <gofer> It's amusing to me that Black saw through that trap but didn't see the final one. Of course, 11) Rxe4 fairly screams "trap," while the ending is a bit more subtle.
Nov-04-13  Nullifidian: Can't see an outright checkmate, so 35. ♖xf5 ♔xf5 36. ♗d7+, winning a piece, looks like the next best thing.
Nov-04-13  Shamot: 1. Simplify if you can because you are a pawn up.
2. Rxf5 forces the balck king on f5 so you can skewer the king and the rook with your bishop 3. easy endgame for white
Nov-04-13  TheaN: <Once: Whether a puzzle is easy or hard is very much a subjective thing.>

Couldn't agree more, but consider what I said though. Besides the subjective part that creates a puzzle's extremes in terms of solving duration, there is something as an average.

The fact that this puzzle got a 'Monday' stamp and in total six pieces on an open board will decrease the average solving duration compared to a full closed 16 piece Sunday midgame. But also compared to a Monday with 10 pieces, for example.

The only way to determine what really matters and how significantly is to take for example 2012's puzzles, add the solve time of all regular solvers on all puzzle and create a prediction model based on the factors that might influence solve time. Seems a daunting task, even though it is interesting for someone with too much time on their hands haha.

Nov-04-13
Premium Chessgames Member
  kevin86: White gives up rook for gbishop,the forks rook and bishop to gain a bishop.

Thank God for Monday-CG makeses us look like geenyuses.

Nov-04-13  benjinathan: I would say this is a fork. I see a couple posters call it a skewer.

I would have called it a skewer if the white bishop was moved to h3 on move 36. (Ignoring the illegality of the move)

Nov-04-13  benjinathan: Oh sorry, I see <TheaN< made this point.
Nov-04-13
Premium Chessgames Member
  Once: I feel the irresistible need to give a WYB response. WYB = "well, yes, but..."

Today's puzzle is easy and it has relatively few pieces on the board. A typical Friday to Sunday will generally have more pieces, and therefore more complexity. On that basis, you could say that the fewer the pieces the easier the puzzle. That's the "well, yes" bit.

But it doesn't always work that way. Some endgames with vastly reduced body-counts can be real noggin-burners. That's the "yes, but" part.

If we work our way up through the caissic periodic table we find this...

The endgame with fewest pieces is K v K. Simple draw.

Next we have K v K plus something. Queen or rook are easy wins. Bishop and knight are easy draws.

Now we have K v K plus two somethings. That's only four pieces on the board. It's Abba, the Beatles, the Rolling stones. The three musketeers (plus the other one).

But here we find the tricky little blighter that is K v K + B + N. That's a book win but by no means easy.

Not to mention K + P v K + R, and depending on where everyone is standing we have to see how well we know the Philidor and Lucena positions.

And already we are into four man positions which are considerably harder than today's thirteen man POTD.

Besides, if it really was the case that puzzles with fewer pieces were always easier, we would all find that the endgame was easier to play than the middle-game. Which it usually isn't!

Nov-04-13  benjinathan: I have a simple test abotu whether a puzzle is easy: if I can get it, it is easy.

I got today's puzzle. Therefore, it is easy.

Nov-04-13  Bob Loblaw: Skewer, as morfshine writes, or fork? To skewer something, one must stick an impliment through one thing to impale another as in two chunks of tenderloin on a barbecue skewer. Forking on the other hand implies impaling two objects on separate tines of a fork. So, the move ♗d7 in today's puzzle is a fork, while a ♗ on, say, a2 skewers a rook on b3 and another on e6. No?
Nov-04-13
Premium Chessgames Member
  chrisowen: Aced effect be fact fetch in get goods 35.Rxf5+,

flight a go be a good while do to oomph dead duffed,

cad evermore ah goofed each try fop 33...Bf5 allow aground for snuff I've edict cuffed rook lare,

ensnared aim bind f5 arms it now in om ack dig cedes 35.Rxf5+ king feels the pinch eg win f5 back bishop down bed forage 36.Bd7+ good enough to seize victory.

Swamp at tergid hive of course it is a fine display again assailable lead feed in rut castigated off f4 and running lead f5 ace off for a fog gg wades in,

go figure d7 crude a foiled c8 rook gets split camped in too haleves tide abates after heads in da mage f5 we bed in (define d7 as key do speculation) fane f5 and c6 see out the day - having lad see fluffed harm aid lsb 33...Bf5 knock at the door e5,

king bungee jump e5 find express right route again c6 aplomb d7 trapeze c8.

Nov-04-13
Premium Chessgames Member
  Once: <Bob> The way I see it, it goes like this...

Every chess piece has collection of weapons strapped to his person. He has a spear, a sword, a dagger in his belt and a Swiss army knife in his pocket with an attachment for getting boy scouts out of horses' hooves. Or something like that.

Or if you want to go down the Kung Fu route, you can either have one huge sword or two matching daggers.

On any given move, a chess piece can stick one or more weapon in one or more enemy.

If he uses one long sword, spear or pike to impale more than one enemy then it's a pin or a skewer. A pin kills the first guy, a skewer kills the second.

But if he needs to use more than one weapon to hit two enemies, then it's a fork.

In today's POTD, the bishop on d7 eviscerates the rook on c8 with one sword thrust whilst with a second weapon he stabs the king on f5. That's a fork, grasshopper.

Nov-04-13  squlpt: Rook takes. 2 seconds flat for that one. Easy even for a Monday
Nov-04-13  Shamot: OK, after the explanation given by <Once> I now drop my skewer and pick up the fork i.e. please replace the word 'skewer' with "fork' in my previous post. :)
Nov-04-13  dark.horse: In computer science you need two forks ( http://en.wikipedia.org/wiki/Dining... ). In chess you only need one.
Nov-04-13  gauer: Probably the real question for the Monday novice solver is to see how quickly he is going to mop up with a plan after 35. Rxf5 Ke6. In that case, 36. Bd7+ only makes for a lengthy ♙ up ♖ ending, and so the minor spoiler is to see to play one of many moves that allow him to ♖+♗+(♙s+1) vs ♖+♙s game.
Nov-04-13
Premium Chessgames Member
  Penguincw: This is one of the easiest Monday puzzles I have ever seen.
Nov-04-13  jancotianno: 35. Rxf5+ I love Monday puzzles.
Nov-04-13
Premium Chessgames Member
  perfidious: While there are no examples of 11....Qxe4 in this DB, there are three elsewhere, with all ending in draws and two played by competent players; but on playing through the games, one has the impression that this deviation from the main line is dodgy, as Robert Bellin noted in the 1970s in his monograph on the Classical Dutch.

http://www.365chess.com/opening.php...

Nov-04-13  M.Hassan: Skewer or Fork?
Looks like <TheaN> is right. The followings is extracts from the book "chess thinking, the visual dictionary of over 1000 moves, rules, strategies, and concepts" by Bruce pandolfini skewer definition: A tactic by which a line-piece compels an enemy piece to move off a line, exposing another unit to capture or a key square to occupation. The opposite of a pin, Hurdle, or Shish Kabab attack And for demonstration of skewer, the author brings this example:


click for larger view

White wins by giving a "skewer check"
1.Qa3+ Kxa3
2.Nc2#
Obviously, if King declins the sac, Black Queen is lost.

Nov-05-13  sfm: A fine example of the problems Black can have in the Dutch. White plays 9.e4 - well-known tactics - and Black never really manages to solve his weakness on the e-file. He tries to free but loses the e-pawn and goes into an endgame with a pawn less. But a blunder speeds up matters:

After 33.Re5-e4, White threatens the bishop on g4. What to do? 33.-,Bf5??
Not that!
34.Rf4.


click for larger view

White has several threats. The one we know, and also 35.g4 or just 35.Bd7 or 35.Be4, swapping it all on f5 with an easily won Ks+Ps endgame. No way to prevent all of it.

Sliwa must have considered resigning, but inertia makes him make a couple of moves more.

Nov-05-13  TheaN: <Once: And already we are into four man positions which are considerably harder than today's thirteen man POTD.>

Yeah, this is definitely true, that's why I initially made an exception of endgames. But what eventually is defined as true 'endgame' or just a simplified position?

Even I can't really make a clear borderline on the spot. It is dependent on the position, and even this puzzle would be classified as endgame but is definitely an example of something that is on average easier by the day of the week, the open board and fewer amount of pieces. This is caused primarily by the fact that the resulting position is not one of technique, but just a plain win. That would be one way of accounting for 'technique endgames' and exclude them, but that's stretching it too far already, for my taste.

Nov-05-13  AnotherNN: The real puzzle for me is why didn't Black play 13...Nc2 which would have netted him the exchange.
Nov-05-13
Premium Chessgames Member
  Sastre: <AnotherNN: The real puzzle for me is why didn't Black play 13...Nc2 which would have netted him the exchange>

If 13...Nc2, 14.Nh4 Bxh4 15.Be4 Nxe1 (15...Qf7 16.Qxc2 Be7 17.Bxh7+) 16.Bxg6 Nf3+ 17.Kg2 hxg6 18.gxh4.

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